Additional extraction for a Kapex - makes a difference

A while ago I switched over to a 36mm hose for DE on the Kapex and that was a significant improvement over the 27mm. I think one of the main reasons for this improvement was not so much the pipe diameter, but the choke point of the hose connector to the saw. The connector for the 27mm hose has an ID of 23mm, but using a 36mm hose allows use of the full 36mm outlet from the saw, and that's a whopping 245% of the cross sectional area. Furthermore, because the 27mm connector is inserted into the outlet, there is a 6mm annulus ledge all round to impede and disturb the air flow.



However, when doing quite a few cuts the dust still builds up, so I brought the big dust extractor into play as well. Just a simple bit of waterpipe which I can slide in and out to allow for mitre cuts.





Pretty simple rig:







This is the amount of dust from 32 cuts through 90x19mm Cypress Pine, using just the 36mm hooked up to the Cleantex:













Those pics don't show the accumulation of dust on the bench behind the saw.







Using a 2HP DE with a 4" pipe (30 cuts, so two less), as well as the Cleantex shows a significant improvement. I should probably try and work out how to rig a pipe on both sides as extraction would be damn near total then, although going to a mitre cut might be a bit of a problem (and no reasonably simple idea for it has hit me yet).